Nice table printing

Hi,
This will make the tables align in a nicer way.
It is not a big deal atm, but I was going to add more information to those tables - and then it does make a difference.

Before:

    > classmap: 2.007053ms (1.00x)
    > apc:      3.859975ms (1.92x)
    > composer: 5.551908ms (2.77x)
    > psr0:     131.283071ms (65.41x)

After:

    > classmap:   2.114754ms  (1.00x)
    > apc:        4.053876ms  (1.92x)
    > composer:   5.688233ms  (2.69x)
    > psr0:     137.037299ms (64.80x)